X50A Fuse Block - Underhood Top View (LUZ)
X50A FUSE BLOCK - UNDERHOOD FUSE AND RELAY IDENTIFICATION LEGEND (LUZ)
| No. | Device Label Name | Fuse And Relay Description | Rating | Circuits |
|---|---|---|---|---|
| Fuses | ||||
| 1 | - | F1UA Fuse | 15A | Q8 Control Solenoid Valve Assembly (MH8) |
| 2 | - | F2UA Fuse | 15A | K20 Engine Control Module |
| 3 | - | F3UA Fuse | - | Not Used |
| 4 | - | F4UA Fuse | - | Not Used |
| 5 | - | F5UA Fuse | 15A | K20 Engine Control Module, Q8 Control Solenoid Valve Assembly (MH8) |
| 6 | - | F6UA Fuse | 30A | KR12B Windshield Wiper Relay, KR12C Windshield Wiper Speed Control Relay |
| 7 | - | F7UA Fuse | - | Not Used |
| 8 | - | F8UA Fuse | 15A | B136 Exhaust Particulate Matter Sensor |
| 9 | - | F9UA Fuse | - | Not Used |
| 10 | - | F10UA Fuse | 15A | K20 Engine Control Module |
| 11 | - | F11UA Fuse | 10A | B52 Heated Oxygen Sensor (LUZ), E11A Fuel Heater/Water in Fuel Sensor (LUZ) |
| 12 | - | F12UA Fuse | 30A | KR27 Starter Motor Relay |
| 13 | - | F13UA Fuse | 7.5 | K71 Transmission Control Module |
| 14 | - | F14UA Fuse | 15A | B212 Reductant Sensor Module (LUZ) |
| 15 | - | F15UA Fuse | - | Not Used |
| 16 | - | F16UA Fuse | 7.5 | M96 Active Grille Air Shutter Actuator (Y8X) |
| 17 | - | F17UA Fuse | 5A | K36 Inflatable Restraint Sensing and Diagnostic Module |
| 18 | - | F18UA Fuse | - | Not Used |
| 19 | - | F19UA Fuse | - | Not Used |
| 20 | - | F20UA Fuse | 20A | KR23A Fuel Pump Relay (LUZ) |
| 21 | - | F21UA Fuse | 30A | S79LR Window Switch - Left Rear, S79RR Window Switch - Right Rear |
| 22 | - | F22UA Fuse | - | Not Used |
| 23 | - | F23UA Fuse | - | Not Used |
| 24 | - | F24UA Fuse | 30A | M74D Window Motor - Driver (AXG), S79D Window Switch - Driver (AEC), S79P Window Switch - Passenger |
| 25 | - | F25UA Fuse | 20A | M9 Brake Booster Pump Motor |
| 26 | - | F26UA Fuse | 40A | K17 Electronic Brake Control Module |
| 27 | - | F27UA Fuse | 30A | K84 Keyless Entry Control Module |
| 28 | - | F28UA Fuse | 40A | E18 Rear Defogger Grid |
| 29 | - | F29UA Fuse | - | Not Used |
| 30 | - | F30UA Fuse | 15A | K17 Electronic Brake Control Module |
| 31 | - | F31UA Fuse | 20A | K9 Body Control Module |
| 32 | - | F32UA Fuse | 20A | K9 Body Control Module |
| 33 | - | F33UA Fuse | 30A | K29 Seat Heating Control Module (KA1) |
| 34 | - | F34UA Fuse | 25A | K61 Sunroof Control Module (CF5) |
| 35 | - | F35UA Fuse | 30A | T3 Audio Amplifier (UQA) |
| 36 | - | F36UA Fuse | - | Not Used |
| 37 | - | F37UA Fuse | 10A | E13R Headlamp - Right |
| 38 | - | F38UA Fuse | 10A | E13L Headlamp - Left |
| 39 | - | F39UA Fuse | - | Not Used |
| 40 | - | F40UA Fuse | - | Not Used |
| 41 | - | F41UA Fuse | - | Not Used |
| 42 | - | F42UA Fuse | - | Not Used |
| 43 | - | F43UA Fuse | - | Not Used |
| 44 | - | F44UA Fuse | - | Not Used |
| 45 | - | F45UA Fuse | 60A | K22 Cooling Fan Control Module (LUZ) |
| 46 | - | F46UA Fuse | - | Not Used |
| 47 | - | F47UA Fuse | 10A | Q41 Turbocharger Vane Position Control Solenoid Valve (LUZ), Q47 Exhaust Gas Recirculation Cooler Bypass Solenoid Valve (LUZ), E45 Positive Crankcase Ventilation Heater (LUZ), Q44 Engine Oil Pressure Control Solenoid Valve (LUZ), Q21 Intake Manifold Runner Control Solenoid Valve (LUZ) |
| 48 | - | F48UA Fuse | 15A | E29LF Fog Lamp - Left Front (T3U), E29RF Fog Lamp - Right Front (T3U) |
| 49 | - | F49UA Fuse | - | Not Used |
| 50 | - | F50UA Fuse | - | Not Used |
| 51 | - | F51UA Fuse | 15A | P12 Horn |
| 52 | - | F52UA Fuse | 5A | P16 Instrument Cluster |
| 53 | - | F53UA Fuse | 10A | A10 Inside Rearview Mirror (DD8) |
| 54 | - | F54UA Fuse | 5A | K33 HVAC Control Module, P14 Passenger Air Bag Disable Indicator, B87 Rearview Camera |
| 55 | - | F55UA Fuse | 7.5A | S52 Outside Rearview Mirror Switch, S79D Window Switch - Driver (AXG) |
| 56 | - | F56UA Fuse | 15A | G24 Windshield Washer Pump |
| 57 | - | F57UA Fuse | 15A | Not Used |
| 58 | - | F58UA Fuse | - | Not Used |
| 59 | - | F59UA Fuse | 30A | KR22 Fuel Heater Relay (LUZ) |
| 60 | - | F60UA Fuse | 7.5A | A9A Outside Rearview Mirror - Driver (DWE), A9B Outside Rearview Mirror - Passenger (DWE) |
| 61 | - | F63UA Fuse | - | Not Used |
| 62 | - | F62UA Fuse | 10A | KR29 A/C Compressor Clutch Relay |
| 63 | - | F63UA Fuse | - | Not Used |
| 64 | - | F64UA Fuse | 5A | K85 Passenger Presence Module |
| 65 | - | F65UA Fuse | - | Not Used |
| 66 | - | F66UA Fuse | - | Not Used |
| 67 | - | F67UA Fuse | - | Not Used |
| 68 | - | F68UA Fuse | - | Not Used |
| 69 | - | F69UA Fuse | 5A | K9 Body Control Module |
| 70 | - | F70UA Fuse | - | Not Used |
| 71 | - | F71UA Fuse | - | Not Used |
| 72 | - | F6UB Fuse | - | E40 Electrical Auxiliary Heater |
| 73 | - | F5UB Fuse | - | K34 Glow Plug Control Module |
| 74 | - | F74UA Fuse | - | Not Used |
| 75 | - | F75UA Fuse | - | Not Used |
| Relays | ||||
| 1 | - | KR29 A/C Compressor Clutch Relay | - | Q2 A/C Compressor Clutch |
| 2 | - | KR27\Starter Relay | - | M64 Starter Motor |
| 3 | - | - | - | Not Used |
| 4 | - | KR12C Windshield Wiper Speed Control Relay | - | M75 Windshield Wiper Motor |
| 5 | - | KR12B Windshield Wiper Relay | - | KR12C Windshield Wiper Speed Control Relay, M75 Windshield Wiper Motor |
| 6 | - | - | - | Not Used |
| 7 | - | KR75 Engine Controls Ignition Relay | - | F9UA Fuse, F10UA Fuse, F11UA Fuse, F46UA Fuse, F47UA Fuse, KR29 A/C Compressor Clutch Relay |
| 8 | - | KR23A Fuel Pump Relay | - | A7 Fuel Pump and Level Sensor Assembly (LUZ) |
| 9 | - | - | - | Not Used |
| 10 | - | - | - | Not Used |
| 11 | - | - | - | Not Used |
| 12 | - | - | - | Not Used |
| 13 | - | - | - | Not Used |
| 14 | - | - | - | Not Used |
| 15 | - | KR73 Ignition Main Relay | - | F5UA Fuse, F13UA Fuse, F16UA Fuse, F17UA Fuse, F18UA Fuse, F52UA Fuse, F53UA Fuse, F54UA Fuse, F57UA Fuse |
| 16 | - | KR22 Fuel Heater Relay | - | E11A Fuel Heater/ Water in Fuel Sensor (LUZ) |
| 17 | - | KR5 Rear Defogger Relay | - | F28UA |
| Note: Relays listed below are non-serviceable Printed Circuit Board (PCB) relays and are internal to the block. | ||||
| - | - | KR3 Horn Relay | - | F51 Fuse |
| - | - | KR46 Front Fog Lamp Relay | - | F48UA Fuse |
| - | - | KR48 Headlamp High Beam Relay | - | F37UA, F38UA |
| - | - | KR11 Windshield Washer Pump Relay | - | F56UA |
| - | - | KR42L Daytime Running Lamp Relay - Left | - | E4AC Park/Daytime Running Lamp - Left, E4G Headlamp - Left Low Beam |
| - | - | KR42R Daytime Running Lamp Relay - Right | - | E4AD Park/Daytime Running Lamp - Right, E4H Headlamp - Right Low Beam |
| Note: Items listed below are diagnostic test points for PCB relays | ||||
| TP18 | - | TP18 | - | KR42R Daytime Running Lamp Relay - Right |
| TP19 | - | TP19 | - | Not Used |
| TP24 | - | TP24 | - | Not Used |
| TP26 | - | TP26 | - | Not Used |